直接上程式碼。

using System;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Windows.Forms;

namespace DataGridViewTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object
 
 sender, EventArgs e)
        {
            // 資料量很大時，開啟雙緩衝繪製可以明顯提高表格繪製速度，減少拖動滾動條時卡頓
            typeof(DataGridView).InvokeMember("DoubleBuffered", BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.SetProperty, null, dataGridView1, new object[] { true });

            // 禁止新增行
            dataGridView1.AllowUserToAddRows = false
 
;
            // 禁止刪除行
            dataGridView1.AllowUserToDeleteRows = false;
            // 禁止排序列
            dataGridView1.AllowUserToOrderColumns = false;
            // 禁止調整列寬
            dataGridView1.AllowUserToResizeColumns = false;
            // 禁止調整行高
            dataGridView1.AllowUserToResizeRows = false
 
;
            // 隱藏行頭
            dataGridView1.RowHeadersVisible = false;
            // 整行選擇
            dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
            // 禁止編輯
            dataGridView1.ReadOnly = true;
            // 自動調整列寬
            dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.DisplayedCells;
            // 當DataSource賦值時自動生成對應的列(此屬性預設為True)
            dataGridView1.AutoGenerateColumns = true;
        }

        private static readonly Random _random = new Random();

        private static Record MakeRecord(int index)
        {
            return new Record
            {
                Id = index,
                InputVoltage = (float)_random.Next(490, 510) / 100,
                InputCurrent = (float)_random.Next(990, 1190) / 1000,
                OutputVoltage = (float)_random.Next(490, 510) / 100,
                OutputCurrent = (float)_random.Next(990, 1190) / 1000,
                Efficiency = (float)_random.Next(8000, 9000) / 100,
                Step = 1,
                Time = DateTime.Now
            };
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // 生成50000條資料
            Record[] data = Enumerable.Range(1, 50000).Select(MakeRecord).ToArray();

            // 賦值資料來源，根據設定，自動生成所有對應的列
            dataGridView1.DataSource = data;

            // 設定最後一列寬度填滿控制元件
            DataGridViewColumn column = dataGridView1.Columns.GetLastColumn(DataGridViewElementStates.Visible, DataGridViewElementStates.None);
            if (column != null)
            {
                column.AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
            }
        }
    }

    class Record
    {
        public int Id { get; set; }
        public float InputVoltage { get; set; }
        public float InputCurrent { get; set; }
        public float OutputVoltage { get; set; }
        public float OutputCurrent { get; set; }
        public float Efficiency { get; set; }
        public int Step { get; set; }
        public DateTime Time { get; set; }
    }
}